Initial docker setup so that we can locally run linux tests

Author: ktoso

docker/Dockerfile

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+ARG swift_version=nightly-main
+ARG ubuntu_version=jammy
+ARG base_image=docker.io/swiftlang/swift:$swift_version-$ubuntu_version
+FROM $base_image
+# needed to do again after FROM due to docker limitation
+ARG swift_version
+ARG ubuntu_version
+
+# set as UTF-8
+RUN apt-get update && apt-get install -y locales locales-all
+ENV LC_ALL=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
+
+# Build dependencies
+RUN apt-get update && apt-get install -y make curl libc6-dev
+
+# JDK dependency (we require JDK22+ which isn't distributed as package in Jammy)
+# We download the latest supported non-LTS version from OpenJDK: https://jdk.java.net
+RUN echo "Download JDK for: $(uname -m)"
+RUN if [ "$(uname -m)" = 'aarch64' ]; then \
+      echo "Download JDK for: ARM64" && \
+      curl https://download.java.net/java/GA/jdk23/3c5b90190c68498b986a97f276efd28a/37/GPL/openjdk-23_linux-aarch64_bin.tar.gz --output jdk.tar.gz && \
+      EXPECT_JDK_SHA=076dcf7078cdf941951587bf92733abacf489a6570f1df97ee35945ffebec5b7; \
+    else \
+      echo "Download JDK for: x86" && \
+      curl https://download.java.net/java/GA/jdk23/3c5b90190c68498b986a97f276efd28a/37/GPL/openjdk-23_linux-x64_bin.tar.gz --output jdk.tar.gz && \
+      EXPECT_JDK_SHA=08fea92724127c6fa0f2e5ea0b07ff4951ccb1e2f22db3c21eebbd7347152a67; \
+    fi
+# Verify the downlaoded JDK checksums
+RUN JDK_SHA=$(sha256sum jdk.tar.gz | cut -d ' ' -f 1)
+RUN if [ "$JDK_SHA" != "$EXPECT_JDK_SHA" ]; then  \
+          echo "Downloaded JDK SHA does not match expected!" && \
+          exit 1; \
+        else \
+          echo "JDK SHA is correct."; \
+        fi
+# Extract and verify the JDK installation
+RUN tar xzvf jdk.tar.gz && rm jdk.tar.gz && mv jdk-23 jdk
+RUN /jdk/bin/java -version
+ENV JAVA_HOME="/jdk"
+ENV PATH="$PATH:/jdk/bin"

docker/docker-compose.2204.main.yaml

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+services:
+
+  runtime-setup:
+    image: swift-java:22.04-main
+    build:
+      args:
+        base_image: "swiftlang/swift:nightly-main-jammy"
+
+  unit-tests:
+    image: swift-java:22.04-main
+
+  integration-tests:
+    image: swift-java:22.04-main
+
+  documentation-check:
+    image: swift-java:22.04-main
+
+  test:
+    image: swift-java:22.04-main

docker/docker-compose.yaml

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+# this file is not designed to be run directly
+# instead, use the docker-compose.<os>.<swift> files
+# eg docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.1604.41.yaml run test
+services:
+
+  runtime-setup:
+    image: swift-java:default
+    build:
+      context: .
+      dockerfile: Dockerfile
+
+  common: &common
+    image: swift-java:default
+    depends_on: [runtime-setup]
+    volumes:
+      - ~/.ssh:/root/.ssh
+      - ..:/swift-java:z
+    working_dir: /swift-java
+    environment:
+      JAVA_HOME: /jdk
+    cap_drop:
+      - CAP_NET_RAW
+      - CAP_NET_BIND_SERVICE
+
+  soundness:
+    <<: *common
+    command: /bin/bash -xcl "swift -version && uname -a && ./scripts/soundness.sh"
+
+  unit-tests:
+    <<: *common
+    command: /bin/bash -xcl "swift $${SWIFT_TEST_VERB-test} $${WARN_AS_ERROR_ARG-} $${IMPORT_CHECK_ARG-}"
+
+  test-swift:
+    <<: *common
+    command: /bin/bash -xcl "uname -a && swift -version && /jdk/bin/java -version && swift $${SWIFT_TEST_VERB-test} $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-}"
+
+  test-java:
+    <<: *common
+    command: /bin/bash -xcl "uname -a && swift -version && /jdk/bin/java -version && ./gradlew test"
+
+  test:
+    <<: *common
+    command: /bin/bash -xcl "uname -a && swift -version && /jdk/bin/java -version && swift $${SWIFT_TEST_VERB-test} $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-} && ./gradlew test"
+
+  # util
+
+  shell:
+    <<: *common
+    entrypoint: /bin/bash
+